Pressure-fluid-operated tool

ABSTRACT

A pressure-fluid-operated tool has between a pressure source and a pressure-operated valve for releasing pressure to operate a driver, communication via a chamber which is formed within a gastight seal on the tool and between the tool and the workpiece surface only when the tool is properly applied to the workpiece surface.



1. I claim:
 2. A tool according to claim 1, wherein the valve which is operable to open communication between the recess and the source of pressure fluid is arranged to be operated by depression of the work member as the sealing members are engaged with the surface of the workpiece. 